In what situations is it advisable to avoid using frames in conjunction with PHP scripts?

It is advisable to avoid using frames in conjunction with PHP scripts when you need to ensure proper functionality and SEO optimization. Frames can cause issues with bookmarking, navigation, and search engine indexing. Instead, consider using PHP includes to achieve the same result without the drawbacks of frames.

<?php include 'header.php'; ?>
<!-- Content goes here -->
<?php include 'footer.php'; ?>